A 0.4 pJ/bit NRZ Voltage Mode VCSEL Driver for up to 224 Gbit/s SWDM Links. - Urs Hecht; Helia Ordouei; Nikolay Ledentsov Jr.; Philipp Scholz; Patrick Kurth; Ilya E. Titkov; Nikolay N. Ledentsov; Friedel Gerfers (OFC, 2023)